@article{GDZPPN002439166, title = {Linear degeneracy and shock waves.}, journal = {Mathematische Zeitschrift}, volume = {207}, year = {1991}, pages = {583-596}, zbl = {0756.35048}, url = {http://dml.mathdoc.fr/item/GDZPPN002439166} }
Freistühler, Heinrich. Linear degeneracy and shock waves.. Mathematische Zeitschrift, Tome 207 (1991) pp. 583-596. http://gdmltest.u-ga.fr/item/GDZPPN002439166/